020-7828 4925|Store Opening Hours|Glossary
Est. 1985 - the Kind of Service of which Legends are Made
Some Important Information For Our Customers
The shop is now open by appointment only. Alternatively, you can still shop with us online or over the telephone 020-7828 4925.
The shop is now open by appointment only. Alternatively, you can still shop with us online or over the telephone 020-7828 4925.
Grays of Westminster
Photographic Definitions & Questions
Electromagnetic Diaphragm Mechanism
An electromagnetic diaphragm mechanism in the lens barrel provides highly accurate electronic diaphragm or aperture blade control when using auto exposure during continuous shooting. With conventional D/G type lenses, the diaphragm blades are operated by mechanical linkage levers.
